44th president of the United States (2009–) and the first African American to hold the office. Before winning the presidency, Obama represented Illinois in the U.S. Senate (2005–08). He was the third African American to be elected to that body since the end of Reconstruction (1877). In 2009 he was awarded the Nobel Peace Prize “for his extraordinary...

country in North America, a federal republic of 50 states. Besides the 48 conterminous states that occupy the middle latitudes of the continent, the United States includes the state of Alaska, at the northwestern extreme of North America, and the island state of Hawaii, in the mid-Pacific Ocean. The conterminous states are bounded on the north by Canada,...

conflict that involved virtually every part of the world during the years 1939–45. The principal belligerents were the Axis powers— Germany, Italy, and Japan —and the Allies— France, Great Britain, the United States, the Soviet Union, and, to a lesser extent, China. The war was in many respects a continuation, after an uneasy 20-year hiatus, of the...

country that occupies the greater part of South Asia. It is a constitutional republic consisting of 29 states, each with a substantial degree of control over its own affairs; 6 less fully empowered union territories; and the Delhi national capital territory, which includes New Delhi, India’s capital. With roughly one-sixth of the world’s total population,...

island country located off the northwestern coast of mainland Europe. The United Kingdom comprises the whole of the island of Great Britain—which contains England, Wales, and Scotland —as well as the northern portion of the island of Ireland. The name Britain is sometimes used to refer to the United Kingdom as a whole. The capital is London, which...

country of East Asia. It is the largest of all Asian countries and has the largest population of any country in the world. Occupying nearly the entire East Asian landmass, it occupies approximately one-fourteenth of the land area of Earth. Among the major countries of the world, China is surpassed in area by only Russia and Canada, and it is almost...

leader of the National Socialist (Nazi) Party (from 1920/21) and chancellor (Kanzler) and Führer of Germany (1933–45). He was chancellor from January 30, 1933, and, after President Paul von Hindenburg’s death, assumed the twin titles of Führer and chancellor (August 2, 1934). Hitler’s father, Alois (born 1837), was illegitimate. For a time he bore...

an international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the United States, the Middle East, and other regions. The war pitted the Central Powers —mainly Germany, Austria-Hungary, and Turkey —against the Allies—mainly France, Great Britain, Russia, Italy, Japan, and, from 1917, the United States. It ended...

second largest country in the world in area (after Russia), occupying roughly the northern two-fifths of the continent of North America. Despite Canada’s great size, it is one of the world’s most sparsely populated countries. This fact, coupled with the grandeur of the landscape, has been central to the sense of Canadian national identity, as expressed...

country that stretches over a vast expanse of eastern Europe and northern Asia. Once the preeminent republic of the Union of Soviet Socialist Republics (U.S.S.R.; commonly known as the Soviet Union), Russia became an independent country after the dissolution of the Soviet Union in December 1991. Russia is a land of superlatives. By far the world’s...

(December 7, 1941), surprise aerial attack on the U.S. naval base at Pearl Harbor on Oahu Island, Hawaii, by the Japanese that precipitated the entry of the United States into World War II. This year marks the 75th anniversary of the attack. The strike climaxed a decade of worsening relations between the United States and Japan. Japan’s invasion of...

country of north-central Europe, traversing the continent’s main physical divisions, from the outer ranges of the Alps northward across the varied landscape of the Central German Uplands and then across the North German Plain. One of Europe ’s largest countries, Germany encompasses a wide variety of landscapes: the tall, sheer mountains of the south;...

the smallest continent and one of the largest countries on Earth, lying between the Pacific and Indian oceans in the Southern Hemisphere. Australia’s capital is Canberra, located in the southeast between the larger and more important economic and cultural centres of Sydney and Melbourne. The Australian mainland extends from west to east for nearly...

island country lying off the east coast of Asia. It consists of a great string of islands in a northeast-southwest arc that stretches for approximately 1,500 miles (2,400 km) through the western North Pacific Ocean. Nearly the entire land area is taken up by the country’s four main islands; from north to south these are Hokkaido (Hokkaidō), Honshu...

city and port located at the mouth of the Hudson River, southeastern New York state, northeastern U.S. It is the largest and most influential American metropolis, encompassing Manhattan and Staten islands, the western sections of Long Island, and a small portion of the New York state mainland to the north of Manhattan. New York City is in reality a...

country of northwestern Europe. Historically and culturally among the most important nations in the Western world, France has also played a highly significant role in international affairs, with former colonies in every corner of the globe. Bounded by the Atlantic Ocean and the Mediterranean Sea, the Alps and the Pyrenees, France has long provided...

arid, sparsely populated kingdom of the Middle East. Extending across most of the northern and central Arabian Peninsula, Saudi Arabia is a young country that is heir to a rich history. In its western highlands, along the Red Sea, lies the Hejaz, which is the cradle of Islam and the site of that religion’s holiest cities, Mecca and Medina. In the country’s...

American professional boxer and social activist. Ali was the first fighter to win the world heavyweight championship on three separate occasions; he successfully defended this title 19 times. Cassius Marcellus Clay, Jr., grew up in the American South in a time of segregated public facilities. His father, Cassius Marcellus Clay, Sr., supported a wife...

country in the Middle East, located at the eastern end of the Mediterranean Sea. It is bounded to the north by Lebanon, to the northeast by Syria, to the east and southeast by Jordan, to the southwest by Egypt, and to the west by the Mediterranean Sea. Jerusalem is the seat of government and the proclaimed capital, although the latter status has not...

35th president of the United States (1961–63), who faced a number of foreign crises, especially in Cuba and Berlin, but managed to secure such achievements as the Nuclear Test-Ban Treaty and the Alliance for Progress. He was assassinated while riding in a motorcade in Dallas. (For a discussion of the history and nature of the presidency, see presidency...

country in East Asia. It occupies the northern portion of the Korean peninsula, which juts out from the Asian mainland between the East Sea (Sea of Japan) and the Yellow Sea; North Korea covers about 55 percent of the peninsula’s land area. The country is bordered by China and Russia to the north and by the Republic of Korea (South Korea) to the south....

series of airline hijackings and suicide attacks committed by 19 militants associated with the Islamic extremist group al-Qaeda against targets in the United States, the deadliest terrorist attacks on American soil in U.S. history. The attacks against New York City and Washington, D.C., caused extensive death and destruction and triggered an enormous...

(1954–75), a protracted conflict that pitted the communist government of North Vietnam and its allies in South Vietnam, known as the Viet Cong, against the government of South Vietnam and its principal ally, the United States. Called the “American War” in Vietnam (or, in full, the “War Against the Americans to Save the Nation”), the war was also part...

island country of Southeast Asia in the western Pacific Ocean. It is an archipelago consisting of some 7,100 islands and islets lying about 500 miles (800 km) off the coast of Vietnam. Manila is the capital, but nearby Quezon City is the country’s most-populous city. Both are part of the National Capital Region (Metro Manila), located on Luzon, the...

a mountainous, arid, ethnically diverse country of southwestern Asia. Much of Iran consists of a central desert plateau, which is ringed on all sides by lofty mountain ranges that afford access to the interior through high passes. Most of the population lives on the edges of this forbidding, waterless waste. The capital is Tehrān, a sprawling, jumbled...

empire created by Turkish tribes in Anatolia (Asia Minor) that grew to be one of the most powerful states in the world during the 15th and 16th centuries. The Ottoman period spanned more than 600 years and came to an end only in 1922, when it was replaced by the Turkish Republic and various successor states in southeastern Europe and the Middle East....

island country in the South Pacific Ocean, the southwesternmost part of Polynesia. New Zealand is a remote land—one of the last sizable territories suitable for habitation to be populated and settled—and lies more than 1,000 miles (1,600 km) southeast of Australia, its nearest neighbour. The country comprises two main islands—the North and South islands...

43rd president of the United States (2001–09), who led his country’s response to the September 11 terrorist attacks in 2001 and initiated the Iraq War in 2003. Narrowly winning the electoral college vote in 2000 over Vice Pres. Al Gore in one of the closest and most-controversial elections in American history, George W. Bush became the first person...

country that occupies a unique geographic position, lying partly in Asia and partly in Europe. Throughout its history it has acted as both a barrier and a bridge between the two continents. Turkey is situated at the crossroads of the Balkans, Caucasus, Middle East, and eastern Mediterranean. It is among the larger countries of the region in terms of...

country located in northwestern Europe, also known as Holland. “Netherlands” means low-lying country; the name Holland (from Houtland, or “Wooded Land”) was originally given to one of the medieval cores of what later became the modern state and is still used for 2 of its 12 provinces (Noord-Holland and Zuid-Holland). A parliamentary democracy under...